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Parmatech Corporation is a leading supplier of custom manufactured metal injection molding components.
Metal Injection Molding (MIM) is a low cost, high volume manufacturing process that produces parts to near net shape, reducing or eliminating the need for secondary and machining operations. The process technology excels in small parts of complex shape, enabling part manufacturing that may be prohibitive or impossible to make with conventional technologies.
Parmatech Corporation strives to offer the best solution package to our customers as defined by exceeding their expectations. Solutions include identifying prototyping needs, rapid prototyping, alloy development, metrology assistance, and identification and managing complex secondary operations.
We start with a fine metal powder (particle size approximately 10-20 microns) and mix this with a proprietary blend of plastics that we call “binders”. The powders are incorporated, or compounded, into the fluid binder and granulated to form a feedstock for an injection molding machine.
After compounding, the feedstock is injected into a mold to form a “green” part. The injection molding machine, similar to that used in the plastic injection molding industry, heats the feedstock and injects the viscous fluid into the mold. The MIM part in this molded state is often referred to as a ‘green’ part.
The binders are removed through solvent and thermal processing. The step is called debinding, and helps separate the binder materials from the powder metal. Debinding can be done in two or three process steps, depending on the equipment capability.
Finally, the parts are put through a high-temperature sintering furnace where the remaining binders are removed. The powder particles fuse together to reach 98%+ of theoretical density. During this critical step, the parts shrink approximately 20%. We utilize special techniques that result in exceptional metallurgical and dimensional controls, resulting in very repeatable and stable parts.
After sintering, the parts are inspected against high quality standards. At this point, additional operations – such as machining, heat treating or plating – may be undertaken to achieve tighter tolerances or enhanced properties.
From Metal Powder Industries Federation (MPIF) standard materials to custom development of application specific alloys, Parmatech has the material solution for your demanding design requirements. Materials Scientists coupled with in-house custom alloy development allows for solutions beyond typical component suppliers.
If your desired material is not listed here, contact us and we’ll find a solution to meet your needs.
| Material Group | Alloy/Material | Description |
|---|---|---|
|
Low Alloy and Alloy Steels |
MIM-2200 (Fe-2%Ni) MIM-2700 (Fe-2%Ni) MIM-4140 MIM-4605 |
High strength and hardness when heat treated
|
|
Austenitic Stainless Steels |
304L MIM-316L |
Excellent cryogenic properties, superior corrosion resistance, moderate strength and high ductility |
|
Ferritic Stainless Steels |
MIM-430L |
Possess good corrosion and magnetic properties |
|
Martensitic Stainless Steels |
MIM-420 MIM-440 |
Designed to provide moderate corrosion resistance with excellent hardness, strength and wear
|
|
Precipitation Hardening Stainless Steels |
MIM-17-4 PH |
High strength, toughness and hardness, with good corrosion resistance. |
|
Soft Magnetic Materials |
MIM-2200 (Fe-2%Ni) MIM-Fe50%Ni (Fe-50%Ni) MIM-430L MIM-Fe-3%Si (Fe-3%Si) MIM-Fe50%Co |
Soft ferromagnetic materials
|
|
Controlled Expansion and Sealing Materials |
MIM-F15 (Kovar® Alloy)* |
Uniform and low thermal expansion alloys |
|
Copper |
MIM-Cu |
High thermal conductivity and good electrical properties |
|
Tungsten |
W-Ni alloy |
High thermal conductivity and density, good electrical properties
|
| Material Group | Alloy* | Yield Strength (MPa) | UTS (MPa) | Elongation (%) | Density (g/cm³) | Hardness |
|---|---|---|---|---|---|---|
|
Low Alloy & Alloy Steels |
MIM-2200 (Fe-2%Ni) as-sintered |
140 |
300 |
35 |
7.60 |
45 HRB |
|
MIM-2200 (Fe-2%Ni) Heat treated** |
200-600 |
380-650 |
2 to 20 |
7.60 |
>50 HRB (surface) |
|
|
MIM-2700 (Fe-2%Ni) as-sintered |
300 |
390 |
390 |
7.60 |
70 HRB
|
|
|
MIM-2700 (Fe-7%Ni) Heat treated** |
670 |
830 |
9 |
7.60 |
>55 HRC (surface) |
|
|
4140** |
1200 |
1550 |
4 |
44 HRC
|
||
|
MIM-4605 as-sintered |
205 |
440 |
15 |
7.5 |
62 HRB
|
|
|
MIM-4605 quenched and tempered |
1480 |
1655 |
2.0 |
7.5 |
48 HRC |
|
|
Stainless Steels |
MIM-316L |
180 |
500 |
50 |
7.80 |
67 HRB |
|
304 L |
140 |
500 |
70 |
7.75 |
60 HRB |
|
|
MIM-17-4 PH As-sintered |
730 |
900 |
6 |
7.60 |
25 HRC |
|
|
Soft Magnetic Alloys |
MIM-430L |
240 |
410 |
25 |
7.50 |
65 HRB
|
|
MIM-Fe-3%Si |
360 |
530 |
30 |
7.50 |
80 HRB
|
|
|
MIM-Fe-50%Ni |
160 |
450 |
30 |
7.70 |
50 HRB
|
|
|
Controlled Expansion Alloy |
F15 |
300 |
450 |
35 |
7.8 |
75 HRB
|
* Alloys with MIM prefix are also listed in the MPIF Standard 35 (2000 edition) Materials Standard for Metal Injection Molded Parts
** Depending on the type of heat treatment a range of mechanical properties can be obtained in MIM-2200 and MIM-2700, 4140, MIM-4605
Note: Parmatech does not warranty that these materials are fit for any particular application.
All materials need to be tested by the customer to assure that they meet minimum performance criteria.
| Alloy | Density (g/cm³) |
Maximum Permeability, µ max |
Coercive Field Hc (Oe) |
Residual Induction Br (kG) |
Induction, B(kG) @ H=5 Oe 10 Oe 15 Oe |
|---|---|---|---|---|---|
|
MIM-2200 |
7.75 |
3,300 |
1.50 |
7.7 |
12.0 14.0 15.2
|
|
MIM-2700 |
7.85 |
1,700 |
2.30 |
6.2 |
7.8 11.5 13.9
|
|
MIM-Fe-50%Ni |
8.0 |
30,000 |
0.17 |
6.5 |
11.4 12.5 12.9
|
|
MIM-Fe-50%Co |
7.7 |
4,800 |
1.5 |
14 |
— |
|
MIM-Fe-3%Si |
7.55 |
6,700 |
0.69 |
8.7 |
62 HRB
12.5 13.5 14.0
|
|
MIM-430L |
7.60 |
5,000 |
0.67 |
7.3 |
9.75 10.5 11.0
|
1 oersted (Oe) = 79.55 ampere/meter (A/m)
1 kilogauss (kG) = 0.1 tesla (T)
Note: Parmatech does not warranty that these materials are fit for any particular application. All materials need to be tested by the customer to assure that they meet minimum performance criteria.
| Alloy* | Fe | Ni | Cr | C | Si | Mo | Cu | Mn | Others |
|---|---|---|---|---|---|---|---|---|---|
|
MIM-2200 |
Bal |
1.5-2.5 |
|
0.05 max |
1.0 max |
0.5 max |
|
|
|
|
MIM-2700 |
Bal |
6.5-8.5 |
|
0.05 max |
1.0 max |
0.5 max
|
|
|
|
|
MIM-316L |
Bal |
10-14 |
16-18 |
0.03 max |
1.0 max |
2-3 |
|
2.0 max |
|
* Alloys with MIM prefix are also listed in the MPIF Standard 35 (2000 edition)
Materials Standard for Metal Injection Molded Parts
Small mechanical components with complex geometry are ideal candidates for MIM. High volume applications
maximize the cost saving benefits inherent with injection molding, giving design engineers a powerful tool to reduce cost on difficult to machine parts.
There are four main considerations for determining if a part is a good PIM candidate:
| Characteristic | Minimum | Maximum | Optimum |
|---|---|---|---|
|
Mass |
0.01 g 0.0004 oz |
250 g 8.82oz |
<50 g
<1.75 oz |
|
Wall Thickness |
0.125 mm
0.005 in |
7.62 mm
0.300 in |
2.03 mm
0.080 in |
|
Annual Usage |
25,000 |
millions |
>100,000
|
At Parmatech, we believe that tooling is the largest factor in determining a robust and efficient product development timeline, as well as future production stability.. Therefore, it is critical to decide the best route to take when designing and constructing tools for MIM. We offer many flexible options, depending on the stage of your design.
Short-run prototype tools are useful for a very limited number of parts (100-1,000), when several design options are being considered. Typical lead times are as short as 4-5 weeks, depending on part complexity.
Medium-run portotype tools have a typical lifetime of 50,000 shots. They are used for designs that are fairly mature, and are used to gain valuable insight to multi-cavity production tool design. Constructed of soft-tool steels to facilitate quick fabrication, their typical lead time is 4-8 weeks, depending on part complexity.
More information about Parmatech’s partnership with HP and HP’s MetalJet technology coming soon!
